Rotasy engine-valve



J. DAVENPORT.

ROTARY ENGINE VALVE.

APPLICATION man ocT.25.191v.

Patented une 3, 1919.

2 SHEETS-SHEET 2.

IM /V l Il [NVE/V TOR.

JAMES E. DAVENPORT, OF NEW YORK, N. Y., ASSIGNOB. TO UNION TECHNICAL CORPORATION. F NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

ROTARY ENGNE-VALVE.

Specification of Letters Patent.

Fateiited June 1919.

Application led October 25, 1917. Serial No. 198,539.

To allan/wm t may concern:

Be it known that I, JAMEs E. DAVENPORT, a citizen of the United States, and resident of 125 West 119th street, New York city, in the county of New York and State of N ew York, have invented certain new and useful Improvements in Rotary Engine-Valves, of which the following is a specication.

My invention relates to engines and has for its object a rotary valve to admit and exhaust gases from cylinders, and is useful with one or more cylinders.

The object of my invention is a valve provided with suitable packing to render the passage from the valve into the cylinder gas-tight 'and to prevent leakage from the inlet valve opening to the exhaust valve opening and vice versa.

lt consists further of means which through use and its consequent wear become more perfect in operation.

A further object of my invention is a valve head capable of being applied to standard forms of engines, so that the valve 11i-f7 other operating members may be removed therefrom.

In the drawings:

Figure 1 is a section upon the line l- Fig. 2 showing a cross section of my valve in its head.

Fig. 2 is a longitudinal section thereof upon the line 2 2 Fig. 1.

Fig. 3 is a longitudinal view partly in section of my invention as applied to a plurality of cylinders and part of the mechanim, duplicates of parts shown Ibeing omitte Fig. 4 is a view, partly in section, of the valve proper.

Fig. 5 shows the gear which rotates it.

Fig. 6 shows how the power is taken ofi' from the shaft of the engine to drive the gear, Fig. 6 being shown in reduced size.

Fig. 7 is a section of Fig. 3 upon the line 7 7.

F ig. 8 is the left hand end of the parts shown cut ofi1 in Fig. 5.

My invention consists in a. pipe 1 having a conduit 2 adapted to deliver the mixture to the cylinders, a series of Orts 3, one for each cylinder adapted to register during the rotation of the valve with the inlet passagen ways 4 leading into the cylinder spaces 5. The valve is provided also with a concentric space 6 surrounding the inlet pipe and adapted to conduct exhaust gases away from the cylinders, ports 7,y one over each. cylinder, in the pipe 7a being adapted to register with the passageways 4 for the purpose of receiving the exhaust gases. Surrounding the valve is a shoe 8 cut open at 9 and provided with a cylindrical floating projection 10u having packing rings 11, like those of a piston, engaging the wall of the chamber l2 in the casing 13 of the valve head.` This casing may be provided with a water chainber 14 connecting with the water chamber 15 in the upper half of the valve head 16 adapted to be bolted to the lower portion of the valve head by means or' bolts 17.

Surrounding the shoe 8 and located within the valve casing is an additional shoe 18 extending from thel point 19 to the point 20 and heldin place against rotation by fixed abutments 21 and 22 which may form an integral portion of the valve casing at 13 and if desired be machined separately and secured thereto by any suitable means.

Each shoe 8 and 18 is adapted to hug the part within it andmaintain a tight joint therewith. The shoe 18 is preferably provided with flanges 19 adapted to come into contact with the top of the outside 20 of l the valve member 71 to prevent escape of gases laterally from the spaces between the split open ends 9 of the shoe 8.

It will be evident from this construction that the shoe 8 will cling to the valve and make a tight joint therewith as the valve rotates and that the cylindrical projection 10 prevents it from being rotated with the valve, while the packing rings 11 maintain a tight joint so that gases from the port`4 are unable to escape from the ends of the packing shoe 8. The projection 10 fits fairly snugly, allowing for variations in exhaustion, over the cylindrical member 23,`

which forms a passageway for the gases from the port 3 to the cylinder space 5. The member 23 andthe shoe 8 are cut out at 24 to provide a downward pressure against the bottom of that member and thus establish a balance of gas pressure thereon, so that the position of the member 10 will be entirely established by the position of the rotation of the valve member 7a.

This is my preferred form of construction.

desired. This valve, at its left hand, ends in the shaft 27 adapted to be driven by a worm gear 28 and worm 29. Some of the parts described in Figs. 1 and 2 are shown in this figure. Between the lines 30l and 31 may be located as many pairs of inlet and exhaust ports as there may be cylinders.

The right end of the outer member 7a of the valve is mounted in the bearing 26 and delivers to the hollow member 32 which is secured by suitable means to the casing at 32a. The inner tube of the valve is adapted to receive mixture through the hollow member 33 which may be secured to the member 32a and provided with packing 34 to maintain a tight joint between the inlet and exhaust passageways.

' In Fig. 4 are shown the various ports 3 positioned at 90 from each other around the axis of the valve. The exhaust ports 7 are likewise shown positioned at 90o from each other around the aXis of the valve. The valve is geared preferably to rotate once while the crank shaft rotates twice. This operation is suitable for the four-cycle gas engine. When used for two-cycle purposes, either for gas engines or steam engines, the valve should rotate at the same speed as the crank shaft.

The exhaust gases may be discharged through the connection 32 and passageway 35. The valve and its various shoes may be properly secured in place when the upper half 16 of the casing is bolted to the lower part 13 of the casing by the bolts 17. The bearings also may be located and housed in place at the same time. After these two parts of the casing have been bolted together, the'attachments 32 and 33 may be bolted to the casing at one end and the disk 36 at the other end may be screwed into place. An oil supply pipe 37 may deliver oil wherever desired, and other suitable oil conneclionsl well known may be employed. Both parts of the casing may be suitably provided with water chambers interconnecting with each other as indicated by the broken lines 38, and one or more water supply pipes 39 may be located wherever desired to supply and withdraw water from the casing and also from the cylinders, when so desired, for the purpose of cooling the engine.

In Fig. v5, the worm29 is shown mounted in bearings 40 in the member 41 which is journaled freely upon the shaft 27. The worm gear 28 is adapted to be keyed to the shaft by means of the key way 42. The member 41 is held in place by the bolt 43 shown in Fig. 3. The abutment 44 may be employed to prevent the worm rising and .ed to be driven the. abutment 45 (see Fig. 6) may prevent the shaft carrying the worm 29 from being pushed downward. The worm 29 may be keyed toshaft 46, at the lower end of which (see Fig. 6) may be another worm 47 adaptby the worm gear 48, the shaft 46 being journaled at 49 in the member 50 and the member 50 being journaled upon the end 51 of the crank shaft of the engine. The gear 48 may be keyed to the shaft 51.

The pitches of the various worms and gears1 may be varied to suit the type of engine. In a four-cycle engine, the worm gear should be so proportioned as to drive the valve one complete rotation to two rotations of the crank shaft 51. Inatwo-cycle engine, either gas or steam, the valve 1 should be driven at the same speed as the crank shaft.

The casing 52 may be the ordinary engine casingvand may have mounted thereon the cylinder 53 (see Fig. 1), the said casing and cylinder adapted to hold the usual piston, piston rod and crank shaft and such other parts as may coperate with their operation. This particular valve head is adapted to fit an engine of the type known as the Overland. It may be altered to suit any other standard type of engine, when so desired.

Many variations may be made within the scope of my invention, its principal features being pointed out in the accompanying claims.

What I claim is:-

l. In an engine containing a driving mechanism, a. rotary valve adapted to be rotated by said mechanism, alternately presenting inlet and exhaust ports to coperate with said mechanism, a shoe embracing said rotary valve substantially more than 180 and thus provided with means to cause it to cling to said valve, said shoe provided with portions surrounding the passageway adapted to register with the ports of said valve, said shoe having a circular projection provided with means to form a gas-tight joint witha casing connected to said mechanism.

2. The combination in claim 1 having said circular projection cylindrical in form.

3. In an engine containing a driving mechanism, a rotary valve adapted to be rotated by said mechanism, alternately presenting inlet and exhaust ports to coperate with said mechanism, a shoe embracing said rotary valve substantially more than 180O and thus provided with means to cause it to cling to said valve, said shoe provided with portions surrounding the passageway adapted to register with the ports of said valve, said shoe having a circular projection provided with means to form a gas tight joint with a casing connected with said mechanism, said shoe surrounding said valve beingsplit te form resilient arms to enable it to cling to said valve as the joint between valve, said shoe havino a cirenia niet mechanism, said shoe surrounaing said vaive cyinderS. each haring; and

assess y sent-ing iniet and exhaust ports to cooperate 1- vith said mechanism, a shoe emoracing said rotary vai've substantiaiiy more than 189 vand thus provided with means to cause it 'to' cllng to said valve, said shoe provided 'with portions surrounding the passageway adapted torregister with the ports of said n projection provided/With ineens to form a gas tight with a casing connected with said being split to form resilient ari-:ns to enable it to citing to said valve as the joint between it and said vaive `wears away and inea-ns as sociateci therewith to prevent the escape of I gases through said spilt portion, saidnieans to iprevent the escape of gases inciuing an outer shoe embracing the aforementioned i .shoe substantially more than 180 and covering the said split portion therein.

5. in an engine containing a driving mechanism, a rotary valve adapted to he rotated by said mechanism, alternately pre seating inlet and exhaust ports to cooperate with said mechanism, a shoe embracing said rotary valve substantiaiiy more than 180 and thus provided with ineens to cause it to eiing to said vaive, sairishoe provided with portions surrounding; the passageway adag'it-v ed to register with the ports oi said valve, said snee having clrcniar progection provided with means to forni a gas tight goint `with a casing connected with said mechanism, said snee surrounding said vaive heing split to forni resiiient arms to enaloie it to c'ling1 vto said vaive as the joint "between it and said vaive Wea-rs away and means associe-ted therewith to prevent the escape oiE igases through said epiit eration, the iirst mentioned shoe being thinner near the spiit portion and the said eater shoe thi 'ser near the said spiit portion, both shoes having the circniar inside surfaces eccentri the eircaiar outside surfaces.

o. in an engine containing joinraiit passage, a driving mechanism eoogoeratin therewrthj a single rotary vaive engaged h said mechanism to rotate it, having inlet and exhaust ports adapted to register aternateiy with the inlet and exhaust passages in said cylinders, plurality oi' shoes each embracing said rotatable valve substantiaiiy more than 18Go and thus provided with means to cause it to cingl to said valve, said shoe provided with portionssurrounding said passageways adapted toi'register with the ports and vaive, said shoes each havingI a circular projection provided with means toV form a Igas-tight joint with the corresponding eylinder of Said cnfrine.

7. rihe comiiination ciaimed in claim i having a Worin gear driving device geared to said rotary valve. Y

8. rihe combination claimed in claim l, having a casing formed in two parte adapteci to loe securedftogether to contain said rotary valve.

9. The combination claimed in ciaiin 3, having a easing formed in two parte adapted to be secured together to contain said rotary valve.

l0. The combination claimed in ciainfi e, having1 a casing formed in two parts adapted to be secured together to contain said rotary valve.

l1. The combination claiined `in claim 5, havingq a casing formed in two parts adapted to he secured together to contain said rotary vaive.

12. The combination ciaimed in claim having'two concentric gas passageways for said rotary valve, one for iii-coming1 gases and one for out-genugn gases.

13. The combination claimed in ciaim 3, having two concentric gas passageways for said rotary vaives one for incoming gases and one iov outgoingeases.

efe

having two concentric gas passageways for said rotary vaivc, one for iin-coming gases .and one for out-going gases.

i5. ihe combination claimed in claim o, having tivo concentric 2@gas passageways for said r valve, one .for iii-coming gases and one fior out-going gases.

Signed at New Yorin, in the eeen-ty oi? hew orir and State ci New York., this 7th nay ot' Mayi E. 1.9i?.

vifi/'itress Manos i?. ii'inri. 

